I have done a thesis in Human-Computer Interaction(HCI) for final year graduation. During the thesis period, I have completed a project in unity which is Foot & Voice-Based Interaction and a simulated environment of the operation theatre (OT). In this environment, I developed the Voice Control gesture to change the radiological image in the surgical monitor so that a surgeon can check patient status report by itself. I evaluated and executed the environment using their lab in Datasoft System Limited Bangladesh.